Seiko Cal. 5638 - 645

The Seiko 5638-645 represents an important milestone in Seiko's 1980 lineup. It features a Navy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-a0abbcaf826a]

Also known as: Panda, Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1980

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